Ingredients 2 cans (10 oz.) frozen margarita concentrate 1 cup tequila ⅓ cup fresh lime juice (2 to 3 medium limes) 1 medium lime, cut into 6 slices Margarita salt for glass rims, if desired 1 can (12 oz.) lemon-lime carbonated beverage Steps In a medium bowl, combine margarita concentrate, tequila and lime juice; mix well. Pour mixture into 8-inch square (2-quart) glass baking dish. Freeze at least 5 hours or until set. To serve, run a lime wedge around the rim of each glass; dip in margarita salt. For each drink, spoon 2/3 cup frozen mixture into a glass; pour 1/4 cup carbonated beverage over the top. Garnish with lime wedges. Expert Tips Make this refreshing drink several days ahead. Keep it covered in the freezer and add the lemon-lime carbonated beverage just before serving. Look for flavored, colored salts in the beverage aisle of the grocery store. Garnish with lime slices, if desired.